/* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* * HISTORY * * Revision 2.6 92/01/03 20:05:00 dbg * Add a switch to disassemble 16-bit code. * Fix spelling of 'lods' opcodes. * [91/10/30 dbg] * * Revision 2.5 91/10/09 16:05:58 af * Supported disassemble of non current task by passing task parameter. * [91/08/29 tak] * * Revision 2.4 91/05/14 16:05:04 mrt * Correcting copyright * * Revision 2.3 91/02/05 17:11:03 mrt * Changed to new Mach copyright * [91/02/01 17:31:03 mrt] * * Revision 2.2 90/08/27 21:55:56 dbg * Fix register operand for move to/from control/test/debug * register instructions. Add i486 instructions. * [90/08/27 dbg] * * Import db_sym.h. Print instruction displacements in * current radix (signed). Change calling sequence of * db_disasm. * [90/08/21 dbg] * Fix includes. * [90/08/08 dbg] * Created. * [90/07/25 dbg] * */ /* * Instruction disassembler. */ #include #include "debugger.h" /* * Switch to disassemble 16-bit code. */ static BOOL db_disasm_16 = FALSE; /* * Flag to indicate whether we need to display instruction, * or whether we just need to know the address of the next * instruction. */ static BOOL db_display = FALSE; /* * Size attributes */ #define BYTE 0 #define WORD 1 #define LONG 2 #define QUAD 3 #define SNGL 4 #define DBLR 5 #define EXTR 6 #define SDEP 7 #define NONE 8 /* * Addressing modes */ #define E 1 /* general effective address */ #define Eind 2 /* indirect address (jump, call) */ #define Ew 3 /* address, word size */ #define Eb 4 /* address, byte size */ #define R 5 /* register, in 'reg' field */ #define Rw 6 /* word register, in 'reg' field */ #define Ri 7 /* register in instruction */ #define S 8 /* segment reg, in 'reg' field */ #define Si 9 /* segment reg, in instruction */ #define A 10 /* accumulator */ #define BX 11 /* (bx) */ #define CL 12 /* cl, for shifts */ #define DX 13 /* dx, for IO */ #define SI 14 /* si */ #define DI 15 /* di */ #define CR 16 /* control register */ #define DR 17 /* debug register */ #define TR 18 /* test register */ #define I 19 /* immediate, unsigned */ #define Is 20 /* immediate, signed */ #define Ib 21 /* byte immediate, unsigned */ #define Ibs 22 /* byte immediate, signed */ #define Iw 23 /* word immediate, unsigned */ #define Il 24 /* long immediate */ #define O 25 /* direct address */ #define Db 26 /* byte displacement from EIP */ #define Dl 27 /* long displacement from EIP */ #define o1 28 /* constant 1 */ #define o3 29 /* constant 3 */ #define OS 30 /* immediate offset/segment */ #define ST 31 /* FP stack top */ #define STI 32 /* FP stack */ #define X 33 /* extended FP op */ #define XA 34 /* for 'fstcw %ax' */ struct inst { const char *i_name; /* name */ short i_has_modrm; /* has regmodrm byte */ short i_size; /* operand size */ int i_mode; /* addressing modes */ const char *i_extra; /* pointer to extra opcode table */ }; #define op1(x) (x) #define op2(x,y) ((x)|((y)<<8)) #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) struct finst { const char *f_name; /* name for memory instruction */ int f_size; /* size for memory instruction */ int f_rrmode; /* mode for rr instruction */ const char *f_rrname; /* name for rr instruction (or pointer to table) */ }; static const char * const db_Grp6[] = { "sldt", "str", "lldt", "ltr", "verr", "verw", "", "" }; static const char * const db_Grp7[] = { "sgdt", "sidt", "lgdt", "lidt", "smsw", "", "lmsw", "invlpg" }; static const char * const db_Grp8[] = { "", "", "", "", "bt", "bts", "btr", "btc" }; static const struct inst db_inst_0f0x[] = { /*00*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp6 }, /*01*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp7 }, /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, /*04*/ { "", FALSE, NONE, 0, 0 }, /*05*/ { "", FALSE, NONE, 0, 0 }, /*06*/ { "clts", FALSE, NONE, 0, 0 }, /*07*/ { "", FALSE, NONE, 0, 0 }, /*08*/ { "invd", FALSE, NONE, 0, 0 }, /*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, /*0a*/ { "", FALSE, NONE, 0, 0 }, /*0b*/ { "", FALSE, NONE, 0, 0 }, /*0c*/ { "", FALSE, NONE, 0, 0 }, /*0d*/ { "", FALSE, NONE, 0, 0 }, /*0e*/ { "", FALSE, NONE, 0, 0 }, /*0f*/ { "", FALSE, NONE, 0, 0 }, }; static const struct inst db_inst_0f2x[] = { /*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */ /*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */ /*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 }, /*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 }, /*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 }, /*25*/ { "", FALSE, NONE, 0, 0 }, /*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 }, /*27*/ { "", FALSE, NONE, 0, 0 }, /*28*/ { "", FALSE, NONE, 0, 0 }, /*29*/ { "", FALSE, NONE, 0, 0 }, /*2a*/ { "", FALSE, NONE, 0, 0 }, /*2b*/ { "", FALSE, NONE, 0, 0 }, /*2c*/ { "", FALSE, NONE, 0, 0 }, /*2d*/ { "", FALSE, NONE, 0, 0 }, /*2e*/ { "", FALSE, NONE, 0, 0 }, /*2f*/ { "", FALSE, NONE, 0, 0 }, }; static const struct inst db_inst_0f8x[] = { /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, /*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, }; static const struct inst db_inst_0f9x[] = { /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, }; static const struct inst db_inst_0fax[] = { /*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, /*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, /*a3*/ { "bt", TRUE, LONG, op2(E,R), 0 }, /*a4*/ { "shld", TRUE, LONG, op3(Ib,E,R), 0 }, /*a5*/ { "shld", TRUE, LONG, op3(CL,E,R), 0 }, /*a6*/ { "", FALSE, NONE, 0, 0 }, /*a7*/ { "", FALSE, NONE, 0, 0 }, /*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, /*aa*/ { "", FALSE, NONE, 0, 0 }, /*ab*/ { "bts", TRUE, LONG, op2(E,R), 0 }, /*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 }, /*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 }, /*a6*/ { "", FALSE, NONE, 0, 0 }, /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 }, }; static const struct inst db_inst_0fbx[] = { /*b0*/ { "cmpxchg",TRUE, BYTE, op2(E, R), 0 }, /*b1*/ { "cmpxchg",TRUE, LONG, op2(E, R), 0 }, /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, /*b3*/ { "bts", TRUE, LONG, op2(R, E), 0 }, /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, /*b6*/ { "movzb", TRUE, LONG, op2(E, R), 0 }, /*b7*/ { "movzw", TRUE, LONG, op2(E, R), 0 }, /*b8*/ { "", FALSE, NONE, 0, 0 }, /*b9*/ { "", FALSE, NONE, 0, 0 }, /*ba*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp8 }, /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, /*be*/ { "movsb", TRUE, LONG, op2(E, R), 0 }, /*bf*/ { "movsw", TRUE, LONG, op2(E, R), 0 }, }; static const struct inst db_inst_0fcx[] = { /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, /*c2*/ { "", FALSE, NONE, 0, 0 }, /*c3*/ { "", FALSE, NONE, 0, 0 }, /*c4*/ { "", FALSE, NONE, 0, 0 }, /*c5*/ { "", FALSE, NONE, 0, 0 }, /*c6*/ { "", FALSE, NONE, 0, 0 }, /*c7*/ { "", FALSE, NONE, 0, 0 }, /*c8*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*c9*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*ca*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*cb*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*cc*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*cd*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*ce*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, /*cf*/ { "bswap", FALSE, LONG, op1(Ri), 0 }, }; static const struct inst db_inst_0fdx[] = { /*c0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, /*c1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, /*c2*/ { "", FALSE, NONE, 0, 0 }, /*c3*/ { "", FALSE, NONE, 0, 0 }, /*c4*/ { "", FALSE, NONE, 0, 0 }, /*c5*/ { "", FALSE, NONE, 0, 0 }, /*c6*/ { "", FALSE, NONE, 0, 0 }, /*c7*/ { "", FALSE, NONE, 0, 0 }, /*c8*/ { "", FALSE, NONE, 0, 0 }, /*c9*/ { "", FALSE, NONE, 0, 0 }, /*ca*/ { "", FALSE, NONE, 0, 0 }, /*cb*/ { "", FALSE, NONE, 0, 0 }, /*cc*/ { "", FALSE, NONE, 0, 0 }, /*cd*/ { "", FALSE, NONE, 0, 0 }, /*ce*/ { "", FALSE, NONE, 0, 0 }, /*cf*/ { "", FALSE, NONE, 0, 0 }, }; static const struct inst * const db_inst_0f[] = { db_inst_0f0x, 0, db_inst_0f2x, 0, 0, 0, 0, 0, db_inst_0f8x, db_inst_0f9x, db_inst_0fax, db_inst_0fbx, db_inst_0fcx, db_inst_0fdx, 0, 0 }; static const char * const db_Esc92[] = { "fnop", "", "", "", "", "", "", "" }; static const char * const db_Esc93[] = { "", "", "", "", "", "", "", "" }; static const char * const db_Esc94[] = { "fchs", "fabs", "", "", "ftst", "fxam", "", "" }; static const char * const db_Esc95[] = { "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","" }; static const char * const db_Esc96[] = { "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp", "fincstp" }; static const char * const db_Esc97[] = { "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos" }; static const char * const db_Esca4[] = { "", "fucompp","", "", "", "", "", "" }; static const char * const db_Escb4[] = { "", "", "fnclex","fninit","", "", "", "" }; static const char * const db_Esce3[] = { "", "fcompp","", "", "", "", "", "" }; static const char * const db_Escf4[] = { "fnstsw","", "", "", "", "", "", "" }; static const struct finst db_Esc8[] = { /*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, /*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, /*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, /*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, }; static const struct finst db_Esc9[] = { /*0*/ { "fld", SNGL, op1(STI), 0 }, /*1*/ { "", NONE, op1(STI), "fxch" }, /*2*/ { "fst", SNGL, op1(X), (char *)db_Esc92 }, /*3*/ { "fstp", SNGL, op1(X), (char *)db_Esc93 }, /*4*/ { "fldenv", NONE, op1(X), (char *)db_Esc94 }, /*5*/ { "fldcw", NONE, op1(X), (char *)db_Esc95 }, /*6*/ { "fnstenv",NONE, op1(X), (char *)db_Esc96 }, /*7*/ { "fnstcw", NONE, op1(X), (char *)db_Esc97 }, }; static const struct finst db_Esca[] = { /*0*/ { "fiadd", WORD, 0, 0 }, /*1*/ { "fimul", WORD, 0, 0 }, /*2*/ { "ficom", WORD, 0, 0 }, /*3*/ { "ficomp", WORD, 0, 0 }, /*4*/ { "fisub", WORD, op1(X), (char *)db_Esca4 }, /*5*/ { "fisubr", WORD, 0, 0 }, /*6*/ { "fidiv", WORD, 0, 0 }, /*7*/ { "fidivr", WORD, 0, 0 } }; static const struct finst db_Escb[] = { /*0*/ { "fild", WORD, 0, 0 }, /*1*/ { "", NONE, 0, 0 }, /*2*/ { "fist", WORD, 0, 0 }, /*3*/ { "fistp", WORD, 0, 0 }, /*4*/ { "", WORD, op1(X), (char *)db_Escb4 }, /*5*/ { "fld", EXTR, 0, 0 }, /*6*/ { "", WORD, 0, 0 }, /*7*/ { "fstp", EXTR, 0, 0 }, }; static const struct finst db_Escc[] = { /*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, /*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, /*2*/ { "fcom", DBLR, op2(ST,STI), 0 }, /*3*/ { "fcomp", DBLR, op2(ST,STI), 0 }, /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, }; static const struct finst db_Escd[] = { /*0*/ { "fld", DBLR, op1(STI), "ffree" }, /*1*/ { "", NONE, 0, 0 }, /*2*/ { "fst", DBLR, op1(STI), 0 }, /*3*/ { "fstp", DBLR, op1(STI), 0 }, /*4*/ { "frstor", NONE, op1(STI), "fucom" }, /*5*/ { "", NONE, op1(STI), "fucomp" }, /*6*/ { "fnsave", NONE, 0, 0 }, /*7*/ { "fnstsw", NONE, 0, 0 }, }; static const struct finst db_Esce[] = { /*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" }, /*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" }, /*2*/ { "ficom", LONG, 0, 0 }, /*3*/ { "ficomp", LONG, op1(X), (char *)db_Esce3 }, /*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" }, /*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" }, /*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" }, /*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" }, }; static const struct finst db_Escf[] = { /*0*/ { "fild", LONG, 0, 0 }, /*1*/ { "", LONG, 0, 0 }, /*2*/ { "fist", LONG, 0, 0 }, /*3*/ { "fistp", LONG, 0, 0 }, /*4*/ { "fbld", NONE, op1(XA), (char *)db_Escf4 }, /*5*/ { "fld", QUAD, 0, 0 }, /*6*/ { "fbstp", NONE, 0, 0 }, /*7*/ { "fstp", QUAD, 0, 0 }, }; static const struct finst * const db_Esc_inst[] = { db_Esc8, db_Esc9, db_Esca, db_Escb, db_Escc, db_Escd, db_Esce, db_Escf }; static const char * const db_Grp1[] = { "add", "or", "adc", "sbb", "and", "sub", "xor", "cmp" }; static const char * const db_Grp2[] = { "rol", "ror", "rcl", "rcr", "shl", "shr", "shl", "sar" }; static const struct inst db_Grp3[] = { { "test", TRUE, NONE, op2(I,E), 0 }, { "test", TRUE, NONE, op2(I,E), 0 }, { "not", TRUE, NONE, op1(E), 0 }, { "neg", TRUE, NONE, op1(E), 0 }, { "mul", TRUE, NONE, op2(E,A), 0 }, { "imul", TRUE, NONE, op2(E,A), 0 }, { "div", TRUE, NONE, op2(E,A), 0 }, { "idiv", TRUE, NONE, op2(E,A), 0 }, }; static const struct inst db_Grp4[] = { { "inc", TRUE, BYTE, op1(E), 0 }, { "dec", TRUE, BYTE, op1(E), 0 }, { "", TRUE, NONE, 0, 0 }, { "", TRUE, NONE, 0, 0 }, { "", TRUE, NONE, 0, 0 }, { "", TRUE, NONE, 0, 0 }, { "", TRUE, NONE, 0, 0 }, { "", TRUE, NONE, 0, 0 } }; static const struct inst db_Grp5[] = { { "inc", TRUE, LONG, op1(E), 0 }, { "dec", TRUE, LONG, op1(E), 0 }, { "call", TRUE, NONE, op1(Eind),0 }, { "lcall", TRUE, NONE, op1(Eind),0 }, { "jmp", TRUE, NONE, op1(Eind),0 }, { "ljmp", TRUE, NONE, op1(Eind),0 }, { "push", TRUE, LONG, op1(E), 0 }, { "", TRUE, NONE, 0, 0 } }; static const struct inst db_inst_table[256] = { /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, /*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, /*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, /*04*/ { "add", FALSE, BYTE, op2(Is, A), 0 }, /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, /*06*/ { "push", FALSE, NONE, op1(Si), 0 }, /*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, /*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, /*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, /*0f*/ { "", FALSE, NONE, 0, 0 }, /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, /*14*/ { "adc", FALSE, BYTE, op2(Is, A), 0 }, /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, /*16*/ { "push", FALSE, NONE, op1(Si), 0 }, /*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, /*1c*/ { "sbb", FALSE, BYTE, op2(Is, A), 0 }, /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, /*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, /*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, /*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, /*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, /*26*/ { "", FALSE, NONE, 0, 0 }, /*27*/ { "aaa", FALSE, NONE, 0, 0 }, /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, /*2c*/ { "sub", FALSE, BYTE, op2(Is, A), 0 }, /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, /*2e*/ { "", FALSE, NONE, 0, 0 }, /*2f*/ { "das", FALSE, NONE, 0, 0 }, /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, /*36*/ { "", FALSE, NONE, 0, 0 }, /*37*/ { "daa", FALSE, NONE, 0, 0 }, /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, /*3c*/ { "cmp", FALSE, BYTE, op2(Is, A), 0 }, /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, /*3e*/ { "", FALSE, NONE, 0, 0 }, /*3f*/ { "aas", FALSE, NONE, 0, 0 }, /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, /*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, /*60*/ { "pusha", FALSE, LONG, 0, 0 }, /*61*/ { "popa", FALSE, LONG, 0, 0 }, /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, /*63*/ { "arpl", TRUE, NONE, op2(Ew,Rw), 0 }, /*64*/ { "", FALSE, NONE, 0, 0 }, /*65*/ { "", FALSE, NONE, 0, 0 }, /*66*/ { "", FALSE, NONE, 0, 0 }, /*67*/ { "", FALSE, NONE, 0, 0 }, /*68*/ { "push", FALSE, LONG, op1(I), 0 }, /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, /*6a*/ { "push", FALSE, LONG, op1(Ib), 0 }, /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, /*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, /*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, /*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, /*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, /*78*/ { "js", FALSE, NONE, op1(Db), 0 }, /*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, /*80*/ { "", TRUE, BYTE, op2(I, E), (char *)db_Grp1 }, /*81*/ { "", TRUE, LONG, op2(I, E), (char *)db_Grp1 }, /*82*/ { "", TRUE, BYTE, op2(Is,E), (char *)db_Grp1 }, /*83*/ { "", TRUE, LONG, op2(Ibs,E), (char *)db_Grp1 }, /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, /*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, /*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, /*90*/ { "nop", FALSE, NONE, 0, 0 }, /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, /*9b*/ { "wait", FALSE, NONE, 0, 0 }, /*9c*/ { "pushf", FALSE, LONG, 0, 0 }, /*9d*/ { "popf", FALSE, LONG, 0, 0 }, /*9e*/ { "sahf", FALSE, NONE, 0, 0 }, /*9f*/ { "lahf", FALSE, NONE, 0, 0 }, /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, /*ae*/ { "scas", FALSE, BYTE, op1(DI), 0 }, /*af*/ { "scas", FALSE, LONG, op1(DI), 0 }, /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, /*c0*/ { "", TRUE, BYTE, op2(Ib, E), (char *)db_Grp2 }, /*c1*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp2 }, /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, /*c3*/ { "ret", FALSE, NONE, 0, 0 }, /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, /*c8*/ { "enter", FALSE, NONE, op2(Ib, Iw), 0 }, /*c9*/ { "leave", FALSE, NONE, 0, 0 }, /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, /*cb*/ { "lret", FALSE, NONE, 0, 0 }, /*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, /*ce*/ { "into", FALSE, NONE, 0, 0 }, /*cf*/ { "iret", FALSE, NONE, 0, 0 }, /*d0*/ { "", TRUE, BYTE, op2(o1, E), (char *)db_Grp2 }, /*d1*/ { "", TRUE, LONG, op2(o1, E), (char *)db_Grp2 }, /*d2*/ { "", TRUE, BYTE, op2(CL, E), (char *)db_Grp2 }, /*d3*/ { "", TRUE, LONG, op2(CL, E), (char *)db_Grp2 }, /*d4*/ { "aam", TRUE, NONE, 0, 0 }, /*d5*/ { "aad", TRUE, NONE, 0, 0 }, /*d6*/ { "", FALSE, NONE, 0, 0 }, /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, /*d8*/ { "", TRUE, NONE, 0, (char *)db_Esc8 }, /*d9*/ { "", TRUE, NONE, 0, (char *)db_Esc9 }, /*da*/ { "", TRUE, NONE, 0, (char *)db_Esca }, /*db*/ { "", TRUE, NONE, 0, (char *)db_Escb }, /*dc*/ { "", TRUE, NONE, 0, (char *)db_Escc }, /*dd*/ { "", TRUE, NONE, 0, (char *)db_Escd }, /*de*/ { "", TRUE, NONE, 0, (char *)db_Esce }, /*df*/ { "", TRUE, NONE, 0, (char *)db_Escf }, /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, /*f0*/ { "", FALSE, NONE, 0, 0 }, /*f1*/ { "", FALSE, NONE, 0, 0 }, /*f2*/ { "", FALSE, NONE, 0, 0 }, /*f3*/ { "", FALSE, NONE, 0, 0 }, /*f4*/ { "hlt", FALSE, NONE, 0, 0 }, /*f5*/ { "cmc", FALSE, NONE, 0, 0 }, /*f6*/ { "", TRUE, BYTE, 0, (char *)db_Grp3 }, /*f7*/ { "", TRUE, LONG, 0, (char *)db_Grp3 }, /*f8*/ { "clc", FALSE, NONE, 0, 0 }, /*f9*/ { "stc", FALSE, NONE, 0, 0 }, /*fa*/ { "cli", FALSE, NONE, 0, 0 }, /*fb*/ { "sti", FALSE, NONE, 0, 0 }, /*fc*/ { "cld", FALSE, NONE, 0, 0 }, /*fd*/ { "std", FALSE, NONE, 0, 0 }, /*fe*/ { "", TRUE, NONE, 0, (char *)db_Grp4 }, /*ff*/ { "", TRUE, NONE, 0, (char *)db_Grp5 }, }; static const struct inst db_bad_inst = { "???", FALSE, NONE, 0, 0 } ; #define f_mod(byte) ((byte)>>6) #define f_reg(byte) (((byte)>>3)&0x7) #define f_rm(byte) ((byte)&0x7) #define sib_ss(byte) ((byte)>>6) #define sib_index(byte) (((byte)>>3)&0x7) #define sib_base(byte) ((byte)&0x7) struct i_addr { int is_reg; /* if reg, reg number is in 'disp' */ int disp; const char * base; const char * index; int ss; }; static const char * const db_index_reg_16[8] = { "%bx,%si", "%bx,%di", "%bp,%si", "%bp,%di", "%si", "%di", "%bp", "%bx" }; static const char * const db_reg[3][8] = { { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } }; static const char * const db_seg_reg[8] = { "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" }; /* * lengths for size attributes */ static const int db_lengths[] = { 1, /* BYTE */ 2, /* WORD */ 4, /* LONG */ 8, /* QUAD */ 4, /* SNGL */ 8, /* DBLR */ 10, /* EXTR */ }; static unsigned int db_get_task_value( const DBG_ADDR *addr, int size, int is_signed ) { unsigned int result; unsigned char *p = DBG_ADDR_TO_LIN( addr ); switch(size) { case 4: if (is_signed) result = (unsigned int) *(int *)p; else result = *(unsigned int *)p; break; case 2: if (is_signed) result = (unsigned int) *(short int *)p; else result = *(unsigned short int *)p; break; case 1: if (is_signed) result = (unsigned int) *(char *)p; else result = *(unsigned char *)p; break; default: fprintf(stderr, "Illegal size specified\n"); result = 0; break; } return result; } #define get_value_inc(result, addr, size, is_signed) \ result = db_get_task_value((addr), (size), (is_signed)); \ if (!db_disasm_16) (addr)->off += (size); \ else (addr)->off = ((addr)->off + (size)) & 0xffff; /* * Read address at location and return updated location. */ void db_read_address( DBG_ADDR *addr, int short_addr, int regmodrm, struct i_addr *addrp ) { int mod, rm, sib, index, disp; mod = f_mod(regmodrm); rm = f_rm(regmodrm); if (mod == 3) { addrp->is_reg = TRUE; addrp->disp = rm; return; } addrp->is_reg = FALSE; addrp->index = 0; if (short_addr) { addrp->index = 0; addrp->ss = 0; switch (mod) { case 0: if (rm == 6) { get_value_inc(disp, addr, 2, TRUE); addrp->disp = disp; addrp->base = 0; } else { addrp->disp = 0; addrp->base = db_index_reg_16[rm]; } break; case 1: get_value_inc(disp, addr, 1, TRUE); addrp->disp = disp; addrp->base = db_index_reg_16[rm]; break; case 2: get_value_inc(disp, addr, 2, TRUE); addrp->disp = disp; addrp->base = db_index_reg_16[rm]; break; } } else { if (mod != 3 && rm == 4) { get_value_inc(sib, addr, 1, FALSE); rm = sib_base(sib); index = sib_index(sib); if (index != 4) addrp->index = db_reg[LONG][index]; addrp->ss = sib_ss(sib); } switch (mod) { case 0: if (rm == 5) { get_value_inc(addrp->disp, addr, 4, FALSE); addrp->base = 0; } else { addrp->disp = 0; addrp->base = db_reg[LONG][rm]; } break; case 1: get_value_inc(disp, addr, 1, TRUE); addrp->disp = disp; addrp->base = db_reg[LONG][rm]; break; case 2: get_value_inc(disp, addr, 4, FALSE); addrp->disp = disp; addrp->base = db_reg[LONG][rm]; break; } } } static void db_task_printsym(unsigned int addr, int size) { DBG_ADDR address; address.type = NULL; address.seg = 0; address.off = addr; DEBUG_PrintAddress( &address, db_disasm_16 ? 16 : 32, TRUE ); } void db_print_address(char *seg, int size, struct i_addr *addrp, int byref) { if (addrp->is_reg) { fprintf(stderr,"%s", db_reg[size][addrp->disp]); return; } if (seg) { fprintf(stderr,"%s:", seg); } if (addrp->base != 0 || addrp->index != 0) { fprintf(stderr,"0x%x", addrp->disp); fprintf(stderr,"("); if (addrp->base) fprintf(stderr,"%s", addrp->base); if (addrp->index) fprintf(stderr,",%s,%d", addrp->index, 1<ss); fprintf(stderr,")"); } else { /* try to get destination of indirect call does not work for segmented adresses */ if (!seg && byref) { DBG_ADDR dbg_addr = {NULL, 0, 0}; dbg_addr.off = addrp->disp; fprintf(stderr,"0x%x -> ", addrp->disp); if (DEBUG_IsBadReadPtr( &dbg_addr, sizeof(LPDWORD))) { fprintf(stderr, "(invalid source)"); } else { dbg_addr.off = *(LPDWORD)(addrp->disp); if (DEBUG_IsBadReadPtr( &dbg_addr, sizeof(DWORD))) fprintf(stderr, "(invalid destination)"); else db_task_printsym(dbg_addr.off, 0); } } else db_task_printsym(addrp->disp, size); } } /* * Disassemble floating-point ("escape") instruction * and return updated location. */ void db_disasm_esc( DBG_ADDR *addr, int inst, int short_addr, int size, char *seg ) { int regmodrm; const struct finst *fp; int mod; struct i_addr address; const char * name; get_value_inc(regmodrm, addr, 1, FALSE); if( !db_display ) { return; } fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; mod = f_mod(regmodrm); if (mod != 3) { /* * Normal address modes. */ db_read_address( addr, short_addr, regmodrm, &address); fprintf(stderr,fp->f_name); switch(fp->f_size) { case SNGL: fprintf(stderr,"s"); break; case DBLR: fprintf(stderr,"l"); break; case EXTR: fprintf(stderr,"t"); break; case WORD: fprintf(stderr,"s"); break; case LONG: fprintf(stderr,"l"); break; case QUAD: fprintf(stderr,"q"); break; default: break; } fprintf(stderr,"\t"); db_print_address(seg, BYTE, &address, 0); } else { /* * 'reg-reg' - special formats */ switch (fp->f_rrmode) { case op2(ST,STI): name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; fprintf(stderr,"%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); break; case op2(STI,ST): name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; fprintf(stderr,"%s\t%%st(%d),%%st",name, f_rm(regmodrm)); break; case op1(STI): name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; fprintf(stderr,"%s\t%%st(%d)",name, f_rm(regmodrm)); break; case op1(X): fprintf(stderr,"%s", ((char **)fp->f_rrname)[f_rm(regmodrm)]); break; case op1(XA): fprintf(stderr,"%s\t%%ax", ((char **)fp->f_rrname)[f_rm(regmodrm)]); break; default: fprintf(stderr,""); break; } } } /*********************************************************************** * DEBUG_Disasm * * Disassemble instruction at 'addr'. addr is changed to point to the * start of the next instruction. */ void DEBUG_Disasm( DBG_ADDR *addr, int display ) { int inst; int size; int short_addr; char * seg; const struct inst *ip; const char *i_name; int i_size; int i_mode; int regmodrm = 0; BOOL first; int displ; int prefix; int imm; int len; struct i_addr address; /* * Set this so we get can supress the printout if we need to. */ db_display = display; db_disasm_16 = IS_SELECTOR_V86(addr->seg) || !IS_SELECTOR_32BIT(addr->seg); get_value_inc( inst, addr, 1, FALSE ); if (db_disasm_16) { short_addr = TRUE; size = WORD; } else { short_addr = FALSE; size = LONG; } seg = 0; /* * Get prefixes */ prefix = TRUE; do { switch (inst) { case 0x66: /* data16 */ if (size == LONG) size = WORD; else size = LONG; break; case 0x67: short_addr = !short_addr; break; case 0x26: seg = "%es"; break; case 0x36: seg = "%ss"; break; case 0x2e: seg = "%cs"; break; case 0x3e: seg = "%ds"; break; case 0x64: seg = "%fs"; break; case 0x65: seg = "%gs"; break; case 0xf0: if( db_display ) fprintf(stderr,"lock "); break; case 0xf2: if( db_display ) fprintf(stderr,"repne "); break; case 0xf3: if( db_display ) fprintf(stderr,"repe "); /* XXX repe VS rep */ break; default: prefix = FALSE; break; } if (prefix) { get_value_inc(inst, addr, 1, FALSE); } } while (prefix); if (inst >= 0xd8 && inst <= 0xdf) { db_disasm_esc( addr, inst, short_addr, size, seg); return; } if (inst == 0x0f) { get_value_inc(inst, addr, 1, FALSE); ip = db_inst_0f[inst>>4]; if (ip == 0) { ip = &db_bad_inst; } else { ip = &ip[inst&0xf]; } } else ip = &db_inst_table[inst]; if (ip->i_has_modrm) { get_value_inc(regmodrm, addr, 1, FALSE); db_read_address( addr, short_addr, regmodrm, &address); } i_name = ip->i_name; i_size = ip->i_size; i_mode = ip->i_mode; if (ip->i_extra == (char *)db_Grp1 || ip->i_extra == (char *)db_Grp2 || ip->i_extra == (char *)db_Grp6 || ip->i_extra == (char *)db_Grp7 || ip->i_extra == (char *)db_Grp8) { i_name = ((char **)ip->i_extra)[f_reg(regmodrm)]; } else if (ip->i_extra == (char *)db_Grp3) { ip = (struct inst *)ip->i_extra; ip = &ip[f_reg(regmodrm)]; i_name = ip->i_name; i_mode = ip->i_mode; } else if (ip->i_extra == (char *)db_Grp4 || ip->i_extra == (char *)db_Grp5) { ip = (struct inst *)ip->i_extra; ip = &ip[f_reg(regmodrm)]; i_name = ip->i_name; i_mode = ip->i_mode; i_size = ip->i_size; } if (i_size == SDEP) { if( db_display ) { if (size == WORD) fprintf(stderr,i_name); else fprintf(stderr,ip->i_extra); } } else { if( db_display ) { fprintf(stderr,i_name); } if (i_size != NONE) { if (i_size == BYTE) { if( db_display ) { fprintf(stderr,"b"); } size = BYTE; } else if (i_size == WORD) { if( db_display ) { fprintf(stderr,"w"); } size = WORD; } else if (size == WORD) { if( db_display ) { fprintf(stderr,"w"); } } else { if( db_display ) { fprintf(stderr,"l"); } } } } if( db_display ) { fprintf(stderr,"\t"); } for (first = TRUE; i_mode != 0; i_mode >>= 8, first = FALSE) { if (!first && db_display) fprintf(stderr,","); switch (i_mode & 0xFF) { case E: if( db_display ) { db_print_address(seg, size, &address, 0); } break; case Eind: if( db_display ) { fprintf(stderr,"*"); db_print_address(seg, size, &address, 1); } break; case Ew: if( db_display ) { db_print_address(seg, WORD, &address, 0); } break; case Eb: if( db_display ) { db_print_address(seg, BYTE, &address, 0); } break; case R: if( db_display ) { fprintf(stderr,"%s", db_reg[size][f_reg(regmodrm)]); } break; case Rw: if( db_display ) { fprintf(stderr,"%s", db_reg[WORD][f_reg(regmodrm)]); } break; case Ri: if( db_display ) { fprintf(stderr,"%s", db_reg[size][f_rm(inst)]); } break; case S: if( db_display ) { fprintf(stderr,"%s", db_seg_reg[f_reg(regmodrm)]); } break; case Si: if( db_display ) { fprintf(stderr,"%s", db_seg_reg[f_reg(inst)]); } break; case A: if( db_display ) { fprintf(stderr,"%s", db_reg[size][0]); /* acc */ } break; case BX: if( db_display ) { if (seg) fprintf(stderr,"%s:", seg); fprintf(stderr,"(%s)", short_addr ? "%bx" : "%ebx"); } break; case CL: if( db_display ) { fprintf(stderr,"%%cl"); } break; case DX: if( db_display ) { fprintf(stderr,"%%dx"); } break; case SI: if( db_display ) { if (seg) fprintf(stderr,"%s:", seg); fprintf(stderr,"(%s)", short_addr ? "%si" : "%esi"); } break; case DI: if( db_display ) { fprintf(stderr,"%%es:(%s)", short_addr ? "%di" : "%edi"); } break; case CR: if( db_display ) { fprintf(stderr,"%%cr%d", f_reg(regmodrm)); } break; case DR: if( db_display ) { fprintf(stderr,"%%dr%d", f_reg(regmodrm)); } break; case TR: if( db_display ) { fprintf(stderr,"%%tr%d", f_reg(regmodrm)); } break; case I: len = db_lengths[size]; get_value_inc(imm, addr, len, FALSE);/* unsigned */ if( db_display ) { fprintf(stderr,"$0x%x", imm); } break; case Is: len = db_lengths[size]; get_value_inc(imm, addr, len, TRUE); /* signed */ if( db_display ) { fprintf(stderr,"$%d", imm); } break; case Ib: get_value_inc(imm, addr, 1, FALSE); /* unsigned */ if( db_display ) { fprintf(stderr,"$0x%x", imm); } break; case Ibs: get_value_inc(imm, addr, 1, TRUE); /* signed */ if( db_display ) { fprintf(stderr,"$%d", imm); } break; case Iw: get_value_inc(imm, addr, 2, FALSE); /* unsigned */ if( db_display ) { fprintf(stderr,"$0x%x", imm); } break; case Il: get_value_inc(imm, addr, 4, FALSE); if( db_display ) { fprintf(stderr,"$0x%x", imm); } break; case O: if (short_addr) { get_value_inc(displ, addr, 2, TRUE); } else { get_value_inc(displ, addr, 4, TRUE); } if( !db_display ) { break; } if (seg) fprintf(stderr,"%s:0x%x",seg, displ); else db_task_printsym(displ, short_addr ? WORD : LONG); break; case Db: get_value_inc(displ, addr, 1, TRUE); if( !db_display ) { break; } if (size == WORD) { /* offset only affects low 16 bits */ displ = (addr->off & 0xffff0000) | ((addr->off + displ) & 0xffff); } else displ += addr->off; db_task_printsym(displ, size); break; case Dl: if (size == WORD) { get_value_inc(displ, addr, 2, TRUE); /* offset only affects low 16 bits */ displ = (addr->off & 0xffff0000) | ((addr->off + displ) & 0xffff); } else { get_value_inc(displ, addr, 4, TRUE); displ += addr->off; } if( !db_display ) { break; } db_task_printsym( displ, size ); break; case o1: if( db_display ) { fprintf(stderr,"$1"); } break; case o3: if( db_display ) { fprintf(stderr,"$3"); } break; case OS: { DBG_ADDR address; get_value_inc( address.off, addr, /* offset */ short_addr ? 2 : 4, FALSE ); get_value_inc( address.seg, addr, /* segment */ 2, FALSE ); if( db_display ) { DEBUG_PrintAddress( &address, short_addr ? 16 : 32, TRUE ); } } break; } } }